US3916866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine having reciprocating piston and rotary piston
Assignee: Individual
•
Filing: 1972-10-11
•
Granted: 1975-11-04
•
Expires: 1992-10-11
Abstract
Abstract An engine having a reciprocating piston and rotary piston rod wherein, the piston rod is provided with a spiral groove for receiving a detent carried by the piston, a spline connection being provided between the piston and the cylinder wall to prevent rotation of the piston.
Inventors
- 👤 Joseph M Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/365; F01; F01B; F01B3/00; F01B3/0079
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
In an internal combustion engine of tye type employing reciprocating piston means slidably mounted on the head-end of a piston rod for imparting rotary movement to the piston rod, the improvement comprising, radially extending guide means extending between the piston means and the cylinder for preventing rotation of the piston during its reciprocatory movement on the piston rod, said guide means comprising at least one longitudinally extending key secured to the cylinder wall in proximity to only the bottom end thereof, and a keyway formed on the side wall of said piston means in proximity to only the bottom end thereof for receiving said key to thereby provide a spline connection between the piston means and the cylinder in proximity to only the bottom ends thereof, whereby rotation of the piston relative to the piston rod is prevented while the gas-tight integrity of the cylinder on the combustion side of the piston is maintained.
Claim 2
Dependent Claim
154 words
In an internal combustion engine of tye type employing reciprocating piston means slidably mounted on the head-end of a piston rod for imparting rotary movement to the piston rod, the improvement comprising, radially extending guide means extending between the piston means and the cylinder for preventing rotation of the piston during its reciprocatory movement on the piston rod, said guide means comprising at least one longitudinally extending key secured to the cylinder wall in proximity to only the bottom end thereof, and a keyway formed on the side wall of said piston means in proximity to only the bottom end thereof for receiving said key to thereby provide a spline connection between the piston means and the cylinder in proximity to only the bottom ends thereof, whereby rotation of the piston relative to the piston rod is prevented while the gas-tight integrity of the cylinder on the combustion side of the piston is maintained.
Claim 3
Dependent Claim
40 words
In an engine according to claim 1 wherein the piston means comprises a main piston and a smaller secondary piston secured to the lower face of the main piston, said spline connection extending between the secondary piston and the cylinder.
Claim 4
Dependent Claim
42 words
In an engine according to claim 2 wherein rotary motion is imparted to the piston rod by detent means carried by the piston means engaging a spiral groove formed on the piston rod, said detent means being carried by said secondary piston.
Claim 5
Dependent Claim
20 words
In an engine according to claim 3 wherein the detent means comprises at least one radially extending, spring biased pin.
Claim 6
Dependent Claim
36 words
In an engine according to claim 2, wherein a keyway is provided in the lower portion of the main piston which engages the key as the piston reaches the bottom dead center position of its stroke.
References Cited (Backward Citations)
US855256A
Cited
US1089408A
Cited
US1723100A
Cited
US1561826A
Cited
US1537724A
Cited
US2262963A
Cited
US3056386A
Cited
US3255806A
Cited
US3393610A
Cited
US3388603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |